Upload
samson-wiggins
View
222
Download
1
Tags:
Embed Size (px)
Citation preview
Earthquakes at GNSEarthquakes at GNS
Kevin FenaughtyKevin Fenaughty
GeoNet Data Centre ManagerGeoNet Data Centre Manager
ContentContent
• Hypocentres: origin time, latitude, longitude and depth
• Magnitudes
• Standard errors and quality information
• “Felt” reports
StructureStructure
• Each event can have many locations
• Each location can have many magnitude determinations
• Each event has a prime estimate to flatten the data for most purposes
EVENT LOCATION MAGNITUDE
Major characteristicsMajor characteristics
• Stored in Oracle
• Real-time updates from a VMS client
• Publicly available from www.geonet.org.nz
UsesUses
• Plotting seismicity maps – generally the first step in any seismological study
• Looking for statistical trends: developing forecasting techniques
• Investigating damage claims
RelationshipsRelationships
• Earthquakes are linked to both the GNS landslide database and the active faults database
• Hypocentres above magnitude 3.7 are provided to the International Seismological Centre in the United Kingdom for their world-wide catalogue
Development plansDevelopment plans
• After July 2003, to make earthquake waveform data publicly accessible
• After January 2004, to allow “felt” reports to be made on-line by the general public
• Long-term: get into scientists’ “bottom drawers” for special studies
Volcanoes at GNSVolcanoes at GNS
Kevin FenaughtyKevin Fenaughtyon behalf ofon behalf of
Brad ScottBrad Scott
Volcano Surveillance CoordinatorVolcano Surveillance Coordinator
ContentContent
• Visual observations• Photographs• Lake, stream and spring temperatures• Water and gas chemistry• Volcanic earthquakes• Volcanic tremor• Ground deformation• Geology
StructureStructure
• Much of the data is digital, but not in a relational database
• Apart from geology, most data can be organised as a time series
UsersUsers
• Direct users:– In-house GNS staff– World-wide research community
• Indirect users (value-added):– Local, regional and central government
agencies– The tourism and aviation industry– Media and the public
UsesUses
• Development of volcano monitoring techniques
• Quantifying volcano behaviour
• Eruption prediction
• Ashfall prediction for aviation industry
RelationshipsRelationships
• The collection of volcanic gas and water chemistry data will be added to the GNS groundwater database
• Lightning and wind information is supplied by MetService